Also select a matching Lens type from the drop-down list. If you are unsure try the default Normal (rectilinear).

2. Align...

Click on Align... to use an automatic tool such as autopano-sift to match images,
then use the internal hugin optimiser to align them, correct exposure and white
balance. The result will appear in the hugin Preview window, if this looks good then
click the next Create panorama... button. Otherwise you will need to make some
changes to the project in the tabs of the hugin Main window.

3. Create panorama...

Finally, use Create panorama... to stitch the panorama to an image file with standard
quality settings.